海藻复合肥对夏玉米产量及养分吸收利用的影响

Effect of seaweed compound fertilizer on yield and nutrient absorption and utilization of summer maize

为明确新型海藻复合肥在夏玉米上的应用效果,以不施用氮磷钾肥、常规施肥处理为对照,通过大田试验研究了等养分量、减量10%、20%和30%的海藻复合肥对夏玉米产量、生长发育、养分吸收与利用的影响。结果表明,施用等养分量海藻复合肥可促进夏玉米生长发育,显著提高夏玉米产量15.27%,氮磷钾养分积累量显著高于常规施肥,氮、磷、钾肥利用率较常规施肥分别提高29.17%、57.89%、84.21%。海藻复合肥减少10%仍可确保夏玉米稳产,土壤铵态氮、有效磷含量分别显著增加21.06%、15.52%。等养分量海藻复合肥具有较好增产效果、肥料利用率较高,减量10%仍能够维持夏玉米产量及土壤肥力,具有减施增效效果,可在夏玉米生产中推广应用。

In order to clarify the application effect of new seaweed compound fertilizer on summer maize,a field experiment was conducted to study the effects of seaweed compound fertilizer with equal nutrient content,reduction of 10%,20%and 30%on the yield,growth and development,nutrient absorption and utilization of summer maize no NPK fertilizer and conventional fertilization used as control in this experiment.The results showed that the application of equal nutrient content seaweed compound fertilizer could promote the growth and development of summer maize,significantly increase the yield of summer maize by 15.27%.The nutrient accumulation of nitrogen,phosphorus and potassium was significantly higher than that of conventional fertilization.Compared with conventional fertilization,the utilization rate of nitrogen,phosphorus and potassium fertilizer increased by 29.17%,57.89%and 84.21%,respectively.The reduction of seaweed compound fertilizer by 10%could still ensure the stable yield of summer maize,and significantly increased the contents of soil ammonium nitrogen and available phosphorus by 21.06%and 15.52%,respectively.Equal nutrient content seaweed compound fertilizer had better yield increase effect,and higher fertilizer use efficiency.In a word,10%reduction,which could maintain summer maize yield and soil fertility,had the effect of reducing application and increasing efficiency,and be popularized and applied in production of summer maize.